Vaya (the Burgas) lake – the largest natural lake in Bulgaria. It is located to the west of Burgas. The water is 4-11% salty. Fresh water comes from 3 rivers and the neighboring Mandrensko lake that is turned to dam. The lake waters are dirty and it is not recommended to swim there. A lot of people go fishing there. Via Pontica – one of the largest bird migration ‘highways’ passes over the lake and more than 250 bird species can be seen there. Carp fishing is popular in the lake.